主要成分

Objective To analyze the volatile oil from Artemisia indica of Guangxi.

目的分析广西产五月艾挥发油的主要化学成分。

In addition, the gamma ray bursts, which are mysteriousphenomena in high energy astronomic physics research, are also studied in thethesis.

联合实验的主要目的是使乳胶室和大气簇射阵列的特点相互补充，提供更多的信息，进行宇宙线原初粒子的成分、能谱以及超高能强相互作用的研究。

Furthermore, the metallic glass samples are prepared by vacuum injection method and the rationality of above-mentioned relationships and RBF models is directly verified. It is shown that there are extremum phenomena between the Rc andΔd ,Δe and v respectively. However, the positions of the extremum are different from different alloy systems and the extremum phenomena may be related to the optimum composition region and the optimum additive quantity. More elements in the alloy are in favor of the improvement of the GFA. And as for the high GFA alloy, the atomic percentage, atomic radius difference and atomic electronegativity difference are harmoniously matched.

d、Δe和v与临界冷却速度Rc的关系中都出现极值现象，对于不同的合金体系，极值出现的位置不同；金属玻璃的最优成分范围以及各种添加元素的最佳添加量行为，可能与此极值现象相关；合金中包含的组元数目多有利于提高其玻璃形成能力，玻璃形成能力强的合金，其各个组元的原子百分含量、组元原子半径差及其电负性差之间的搭配是很和谐的；融合建模的合金系之间包含的主要组元数量和种类越相近，所建立的模型的可靠程度越高，其预测结果与实测结果越吻合。

And thaw, and cell fusion; Understanding the principles and operation procedures for autoradiograph; Mastering the skills of writing experiment reports and graphic drawing under microscope.

本课程是农业与生物学院本科学生的一门实验课程，本课程主要内容包括：掌握和了解普通光学显微镜、几种特殊显微镜和电镜的一般原理和使用方法；掌握显微镜临时标本的制备，会进行显微测量、细胞计数和染色体观察；初步观察细胞生理现象、细胞化学成分显示、染色体标本制备；掌握细胞培养、细胞冻存与复苏、细胞融合等技术的原理和方法；了解细胞放射自显影技术的原理和操作步骤；掌握实验报告的书写和镜下绘图的技能。

The attractants contain the components of host volatile,bark beetle\'s pheromone and the synthetic components of the host pathogen.

研究结果表明：(1)根据有关成分配制的引诱剂，在我国的主要进口木材上均能诱捕到小蠹虫。

In this paper, an analysis of variance has been made for the effects of some main factors on the testing results obtained by the testing methods in use. The mode of drying was found to be of prime importance, followed by the direction of the flow and the ingredients of the solution.

本文就现用的针织物缩水率测试方法中的一些主要因素对测试结果影响作方差分析，所得结论是其干燥方式的影响至为重要，其次是洗涤中液流转向和溶液成分。

The simulation test show that the main controlling targets which were calculated by the fuzzy controller, including grade of blister copper, components of slag and temperatuere, were compared with industrial data and they agree well.

通过模拟实验可看出，主要控制目标粗铜品位、炉渣成分、温度，其模拟值与生产实际分析值比较接近，偏差不大，表明模糊控制器的控制精度较高，能够较好地控制自热炉的生产，稳定炉子的作业状况，模糊控制器的设计是可行、可靠的。

Hepatitis viruses, alcohol, drugs, poisons, blood fluke,and so on, may irritate liver long term, which then activates hepatic stellate cells living in hepatic sinusoid to excrete excess extracellular matrix.

肝纤维化的形成主要是由于肝炎病毒、酒精、药物、毒物、血吸虫等多种损伤因素长期刺激肝脏，使肝窦内肝星状细胞活化，肝组织内细胞外基质成分过度增生与异常沉积，导致肝脏结构或功能异常。

Seven characters of cocoon filament from 15 strains of Bombyx mori were used in this study for principal component analysis.

采用多元统计分析方法，对15个家蚕品种的7个主要经济性状进行主成分分析。

Bounding surface separation has been selected as the most suitable method for middlings processing, by means of study on crystal structure, physical properties, chemical properties, existing state and disintegration degree of the middlings constituents.

通过对中煤各组成成分的晶体结构、物理性质、化学性质、赋存状态、解离程度等性质的研究，确定了界面分选为适合于中煤洗选深加工的主要方法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。